mozglue/build/arm.h@b8a032363ba2 (annotated)
mozglue/build/arm.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | /* compile-time and runtime tests for whether to use SSE instructions */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef mozilla_arm_h_ |
| michael@0 | 8 | #define mozilla_arm_h_ |
| michael@0 | 9 | |
| michael@0 | 10 | // for definition of MFBT_DATA |
| michael@0 | 11 | #include "mozilla/Types.h" |
| michael@0 | 12 | |
| michael@0 | 13 | /* This is patterned after SSE.h, but provides ARMv5E, ARMv6, and NEON |
| michael@0 | 14 | detection. For reasons similar to the SSE code, code using NEON (even just |
| michael@0 | 15 | in inline asm) needs to be in a separate compilation unit from the regular |
| michael@0 | 16 | code, because it requires an ".fpu neon" directive which can't be undone. |
| michael@0 | 17 | ARMv5E and ARMv6 code may also require an .arch directive, since by default |
| michael@0 | 18 | the assembler refuses to generate code for opcodes outside of its current |
| michael@0 | 19 | .arch setting. |
| michael@0 | 20 | |
| michael@0 | 21 | TODO: Add Thumb, Thumb2, VFP, iwMMX, etc. detection, if we need it. */ |
| michael@0 | 22 | |
| michael@0 | 23 | #if defined(__GNUC__) && defined(__arm__) |
| michael@0 | 24 | |
| michael@0 | 25 | # define MOZILLA_ARM_ARCH 3 |
| michael@0 | 26 | |
| michael@0 | 27 | # if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) \ |
| michael@0 | 28 | || defined(_ARM_ARCH_4) |
| michael@0 | 29 | # undef MOZILLA_ARM_ARCH |
| michael@0 | 30 | # define MOZILLA_ARM_ARCH 4 |
| michael@0 | 31 | # endif |
| michael@0 | 32 | |
| michael@0 | 33 | # if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ |
| michael@0 | 34 | || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ |
| michael@0 | 35 | || defined(__ARM_ARCH_5TEJ__) || defined(_ARM_ARCH_5) |
| michael@0 | 36 | # undef MOZILLA_ARM_ARCH |
| michael@0 | 37 | # define MOZILLA_ARM_ARCH 5 |
| michael@0 | 38 | # endif |
| michael@0 | 39 | |
| michael@0 | 40 | # if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ |
| michael@0 | 41 | || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \ |
| michael@0 | 42 | || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \ |
| michael@0 | 43 | || defined(__ARM_ARCH_6M__) || defined(_ARM_ARCH_6) |
| michael@0 | 44 | # undef MOZILLA_ARM_ARCH |
| michael@0 | 45 | # define MOZILLA_ARM_ARCH 6 |
| michael@0 | 46 | # endif |
| michael@0 | 47 | |
| michael@0 | 48 | # if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ |
| michael@0 | 49 | || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ |
| michael@0 | 50 | || defined(__ARM_ARCH_7EM__) || defined(_ARM_ARCH_7) |
| michael@0 | 51 | # undef MOZILLA_ARM_ARCH |
| michael@0 | 52 | # define MOZILLA_ARM_ARCH 7 |
| michael@0 | 53 | # endif |
| michael@0 | 54 | |
| michael@0 | 55 | |
| michael@0 | 56 | # ifdef __GNUC__ |
| michael@0 | 57 | # define MOZILLA_MAY_SUPPORT_EDSP 1 |
| michael@0 | 58 | |
| michael@0 | 59 | # if defined(HAVE_ARM_SIMD) |
| michael@0 | 60 | # define MOZILLA_MAY_SUPPORT_ARMV6 1 |
| michael@0 | 61 | # endif |
| michael@0 | 62 | |
| michael@0 | 63 | # if defined(HAVE_ARM_NEON) |
| michael@0 | 64 | # define MOZILLA_MAY_SUPPORT_NEON 1 |
| michael@0 | 65 | # endif |
| michael@0 | 66 | |
| michael@0 | 67 | # if defined(HAVE_ARM_SIMD) |
| michael@0 | 68 | # define MOZILLA_MAY_SUPPORT_ARMV7 1 |
| michael@0 | 69 | # endif |
| michael@0 | 70 | # endif |
| michael@0 | 71 | |
| michael@0 | 72 | // When using -mfpu=neon, gcc generates neon instructions. |
| michael@0 | 73 | |
| michael@0 | 74 | # if defined(__ARM_NEON__) |
| michael@0 | 75 | # define MOZILLA_PRESUME_NEON 1 |
| michael@0 | 76 | # endif |
| michael@0 | 77 | |
| michael@0 | 78 | // Currently we only have CPU detection for Linux via /proc/cpuinfo |
| michael@0 | 79 | # if defined(__linux__) || defined(ANDROID) |
| michael@0 | 80 | # define MOZILLA_ARM_HAVE_CPUID_DETECTION 1 |
| michael@0 | 81 | # endif |
| michael@0 | 82 | |
| michael@0 | 83 | #elif defined(_MSC_VER) && defined(_M_ARM) |
| michael@0 | 84 | |
| michael@0 | 85 | # define MOZILLA_ARM_HAVE_CPUID_DETECTION 1 |
| michael@0 | 86 | // _M_ARM on MSVC has current cpu architecture. |
| michael@0 | 87 | # define MOZILLA_ARM_ARCH _M_ARM |
| michael@0 | 88 | |
| michael@0 | 89 | // MSVC only allows external asm for ARM, so we don't have to rely on |
| michael@0 | 90 | // compiler support. |
| michael@0 | 91 | # define MOZILLA_MAY_SUPPORT_EDSP 1 |
| michael@0 | 92 | # if defined(HAVE_ARM_SIMD) |
| michael@0 | 93 | # define MOZILLA_MAY_SUPPORT_ARMV6 1 |
| michael@0 | 94 | # define MOZILLA_MAY_SUPPORT_ARMV7 1 |
| michael@0 | 95 | # endif |
| michael@0 | 96 | # if defined(HAVE_ARM_NEON) |
| michael@0 | 97 | # define MOZILLA_MAY_SUPPORT_NEON 1 |
| michael@0 | 98 | # endif |
| michael@0 | 99 | |
| michael@0 | 100 | #endif |
| michael@0 | 101 | |
| michael@0 | 102 | namespace mozilla { |
| michael@0 | 103 | |
| michael@0 | 104 | namespace arm_private { |
| michael@0 | 105 | #if defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) |
| michael@0 | 106 | #if !defined(MOZILLA_PRESUME_EDSP) |
| michael@0 | 107 | extern bool MFBT_DATA edsp_enabled; |
| michael@0 | 108 | #endif |
| michael@0 | 109 | #if !defined(MOZILLA_PRESUME_ARMV6) |
| michael@0 | 110 | extern bool MFBT_DATA armv6_enabled; |
| michael@0 | 111 | #endif |
| michael@0 | 112 | #if !defined(MOZILLA_PRESUME_ARMV7) |
| michael@0 | 113 | extern bool MFBT_DATA armv7_enabled; |
| michael@0 | 114 | #endif |
| michael@0 | 115 | #if !defined(MOZILLA_PRESUME_NEON) |
| michael@0 | 116 | extern bool MFBT_DATA neon_enabled; |
| michael@0 | 117 | #endif |
| michael@0 | 118 | #endif |
| michael@0 | 119 | } |
| michael@0 | 120 | |
| michael@0 | 121 | #if defined(MOZILLA_PRESUME_EDSP) |
| michael@0 | 122 | # define MOZILLA_MAY_SUPPORT_EDSP 1 |
| michael@0 | 123 | inline bool supports_edsp() { return true; } |
| michael@0 | 124 | #elif defined(MOZILLA_MAY_SUPPORT_EDSP) \ |
| michael@0 | 125 | && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) |
| michael@0 | 126 | inline bool supports_edsp() { return arm_private::edsp_enabled; } |
| michael@0 | 127 | #else |
| michael@0 | 128 | inline bool supports_edsp() { return false; } |
| michael@0 | 129 | #endif |
| michael@0 | 130 | |
| michael@0 | 131 | #if defined(MOZILLA_PRESUME_ARMV6) |
| michael@0 | 132 | # define MOZILLA_MAY_SUPPORT_ARMV6 1 |
| michael@0 | 133 | inline bool supports_armv6() { return true; } |
| michael@0 | 134 | #elif defined(MOZILLA_MAY_SUPPORT_ARMV6) \ |
| michael@0 | 135 | && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) |
| michael@0 | 136 | inline bool supports_armv6() { return arm_private::armv6_enabled; } |
| michael@0 | 137 | #else |
| michael@0 | 138 | inline bool supports_armv6() { return false; } |
| michael@0 | 139 | #endif |
| michael@0 | 140 | |
| michael@0 | 141 | #if defined(MOZILLA_PRESUME_ARMV7) |
| michael@0 | 142 | # define MOZILLA_MAY_SUPPORT_ARMV7 1 |
| michael@0 | 143 | inline bool supports_armv7() { return true; } |
| michael@0 | 144 | #elif defined(MOZILLA_MAY_SUPPORT_ARMV7) \ |
| michael@0 | 145 | && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) |
| michael@0 | 146 | inline bool supports_armv7() { return arm_private::armv7_enabled; } |
| michael@0 | 147 | #else |
| michael@0 | 148 | inline bool supports_armv7() { return false; } |
| michael@0 | 149 | #endif |
| michael@0 | 150 | |
| michael@0 | 151 | #if defined(MOZILLA_PRESUME_NEON) |
| michael@0 | 152 | # define MOZILLA_MAY_SUPPORT_NEON 1 |
| michael@0 | 153 | inline bool supports_neon() { return true; } |
| michael@0 | 154 | #elif defined(MOZILLA_MAY_SUPPORT_NEON) \ |
| michael@0 | 155 | && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) |
| michael@0 | 156 | inline bool supports_neon() { return arm_private::neon_enabled; } |
| michael@0 | 157 | #else |
| michael@0 | 158 | inline bool supports_neon() { return false; } |
| michael@0 | 159 | #endif |
| michael@0 | 160 | |
| michael@0 | 161 | } |
| michael@0 | 162 | |
| michael@0 | 163 | #endif /* !defined(mozilla_arm_h_) */ |
